Description: Data zone centroids are point features that represent the population weighted centre of data zones - the core geography used for the dissemination of results from Scottish Neighbourhood Statistics (SNS). Centroids were calculated from a population weighted sum of Census Output Area centroids that fall within a data zone. Eastings and northings for each Output Area were multiplied by their population, summed based upon the data zone in which they fell, and then divided by the total population of the data zone. These centroids are in turn used to link data zones to other (higher) geographies via a spatial join, producing a 'best-fit' match between data zones and other SNS geographies. This is Version 2 of the dataset, as the original version was shown to produce bias to the north and east. There are 6,505 data zones across Scotland, and each have been assigned an individual code that follows the Scottish Government's standard naming and coding convention. The code prefix is S01, which has been assigned to designate data zones. In some cases, data zones have also been assigned a name. To date, Local Authorities that have named their data zones include Eilean Siar (Western Isles), Falkirk, Fife, Highland, Moray, Shetland, South Lanarkshire, Stirling and West Lothian.
Description: Data zones are the key geography for the dissemination of small area statistics in Scotland and are widely used across the public and private sector. Composed of aggregates of Census Output Areas, data zones are large enough that statistics can be presented accurately without fear of disclosure and yet small enough that they can be used to represent communities. They are designed to have roughly standard populations of 500 to 1,000 household residents, nest within Local Authorities (at the time of the Census), have compact shapes that respect physical boundaries where possible, and to contain households with similar social characteristics. Aggregations of data zones are often used to approximate a larger area of interest or a higher level geography that statistics wouldn’t normally be available for. Data zones also represent a relatively stable geography that can be used to analyse change over time, with changes only occurring after a Census. Data Zone boundaries were first created following the 2001 Census, with 6,505 data zones covering the whole of Scotland.
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